Describe the events of the trypsinogen cascade
What will be an ideal response?
Answer: The three pancreatic proteases are secreted as inactive proenzymes to protect the secreting cells from proteolytic degradation. Upon entering the lumen of the duodenum, trypsinogen is cleaved into active trypsin by a membrane-bound enterokinase. Trypsin then converts chymotrypsinogen and procarboxypeptidase into chymotrypsin and carboxypeptidase, respectively, via enzymatic cleavage.
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Ligaments attach muscle to bone.
Answer the following statement true (T) or false (F)
Which of the following statements regarding contraction in skeletal and smooth muscle is TRUE?
A. In skeletal muscle, calcium initiates contraction by binding to myosin light-chain kinase, while in smooth muscle calcium initiates contraction by binding directly to tropomyosin. B. In skeletal muscle, calcium initiates contraction by binding to troponin, while in smooth muscle calcium initiates contraction by binding to calmodulin. C. In skeletal muscle, calcium ions bind to a regulatory protein on thin filaments; in smooth muscle, calcium ions bind to a regulatory protein on thick filaments. D. In skeletal muscle, calcium initiates contraction by binding to troponin, while in smooth muscle calcium initiates contraction by binding directly to myosin. E. All of the choices are true.
Describe the three roles of the sodium-potassium pump
What will be an ideal response?
The hand is proximal to the elbow.?
Indicate whether the statement is true or false